rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10466 ticks this GP) idle=b7fc/1/0x4000000000000000 softirq=13099/13102 fqs=4450 rcu: hardirqs softirqs csw/system rcu: number: 74451 1735 0 rcu: cputime: 1020 51250 1130 ==> 52480(ms) rcu: (t=10500 jiffies g=11653 q=1308 ncpus=2) CPU: 1 PID: 6273 Comm: syz.0.131 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194 Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 4b e4 ce f6 65 8b 05 1c 33 76 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900001f09e0 EFLAGS: 00000206 RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: 579ce1cd19e47a00 RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: 0000000000000001 RBP: ffffc900001f0a70 R08: ffffffff911bc5e7 R09: 1ffffffff22378bc R10: dffffc0000000000 R11: fffffbfff22378bd R12: dffffc0000000000 R13: ffff88805cd87b28 R14: ffffffff974ccec8 R15: 1ffff9200003e13c FS: 00007f33aed766c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2f059a1796 CR3: 000000001ae8b000 CR4: 00000000003506e0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: debug_object_assert_init+0x1f1/0x2f0 lib/debugobjects.c:900 debug_timer_assert_init kernel/time/timer.c:792 [inline] debug_assert_init kernel/time/timer.c:837 [inline] __mod_timer+0x55/0xd60 kernel/time/timer.c:1020 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x570/0x810 kernel/time/timer.c:2023 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x27d/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:lock_release+0x0/0x8c0 kernel/locking/lockdep.c:5762 Code: 07 80 c1 03 38 c1 0f 8c 5d fa ff ff 4c 89 f7 e8 26 d4 76 00 e9 50 fa ff ff 41 be 2f 00 00 00 e9 66 fa ff ff 66 0f 1f 44 00 00 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 RSP: 0018:ffffc900056bf280 EFLAGS: 00000293 RAX: ffffffff81ea6e5c RBX: ffffffff81ea6bcd RCX: ffff88807a9b1e00 RDX: 0000000000000000 RSI: ffffffff81ea6bcd RDI: ffffffff8d131e60 RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff22378a0 R10: dffffc0000000000 R11: fffffbfff22378a1 R12: dffffc0000000000 R13: 0000000000000008 R14: 0000000000000001 R15: ffff88813fff9180 rcu_lock_release include/linux/rcupdate.h:344 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:899 [inline] pfn_valid+0x3c5/0x420 include/linux/mmzone.h:2021 page_table_check_clear+0x1e/0x6a0 mm/page_table_check.c:70 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline] zap_pte_range mm/memory.c:1429 [inline] zap_pmd_range mm/memory.c:1571 [inline] zap_pud_range mm/memory.c:1600 [inline] zap_p4d_range mm/memory.c:1621 [inline] unmap_page_range+0x1c35/0x32f0 mm/memory.c:1642 unmap_vmas+0x286/0x3f0 mm/memory.c:1732 exit_mmap+0x238/0xb90 mm/mmap.c:3302 __mmput+0x118/0x3a0 kernel/fork.c:1357 mmput kernel/fork.c:1379 [inline] dup_mm kernel/fork.c:1710 [inline] copy_mm+0xc09/0x1e30 kernel/fork.c:1743 copy_process+0x171d/0x3df0 kernel/fork.c:2508 kernel_clone+0x24b/0x8a0 kernel/fork.c:2917 __do_sys_clone kernel/fork.c:3060 [inline] __se_sys_clone kernel/fork.c:3044 [inline] __x64_sys_clone+0x1b7/0x230 kernel/fork.c:3044 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f33adf9ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f33aed75fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f33ae216090 RCX: 00007f33adf9ce59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000011 RBP: 00007f33ae032e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f33ae216128 R14: 00007f33ae216090 R15: 00007fff8e604fc8